package com.nowcoder.community.controller;

import com.nowcoder.community.entity.*;
import com.nowcoder.community.event.EventProducer;
import com.nowcoder.community.service.CommentService;
import com.nowcoder.community.service.DiscussPostService;
import com.nowcoder.community.service.LikeService;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.utils.CommunityConstant;
import com.nowcoder.community.utils.CommunityUtil;
import com.nowcoder.community.utils.HostHolder;
import com.nowcoder.community.utils.RedisUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.*;

@Controller
@RequestMapping("/discuss")
public class DiscussPostController implements CommunityConstant {

    @Autowired
    private DiscussPostService discussPostService;

    @Autowired
    private HostHolder hostHolder;

    @Autowired
    private UserService userService;

    @Autowired
    private CommentService commentService;

    @Autowired
    private LikeService likeService;

    @Autowired
    private EventProducer eventProducer;

    @Autowired
    private RedisTemplate redisTemplate;

    @RequestMapping(path = "/add", method = RequestMethod.POST)
    @ResponseBody
    public String addDiscussPost(String title, String content) {
        User user = hostHolder.getUser();
        if (user == null){
            return CommunityUtil.getJSONString(403,"你还没有登录哦！");
        }

        DiscussPost discussPost = new DiscussPost();
        discussPost.setUserId(user.getId());
        discussPost.setTitle(title);
        discussPost.setContent(content);
        discussPost.setCreateTime(new Date());
        discussPostService.insertDiscussPost(discussPost);

        //触发发帖事件
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setEntityId(discussPost.getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setUserId(user.getId());

        eventProducer.fireEvent(event);


        //计算帖子分数
        String postScoreKey = RedisUtil.getPostScoreKey();
        redisTemplate.opsForSet().add(postScoreKey,discussPost.getId());

        //报错的情况将来统一处理
        return CommunityUtil.getJSONString(0,"发布成功！");
    }

    /**
     * 获取帖子详情
     * @param discussPostId
     * @param model
     * @return
     */
//    @RequestMapping(path = "/detail/{discussPostId}",method = RequestMethod.GET)
//    public String getDiscussPost(@PathVariable("discussPostId") int discussPostId, Model model, Page page){
//        DiscussPost discussPost = discussPostService.findDiscussPostById(discussPostId);
//        model.addAttribute("post",discussPost);
//
//        //作者
//        User user = userService.findUserById(discussPost.getUserId());
//        model.addAttribute("user",user);
//
//        //评论信息分页
//        //查询总数
//        page.setLimit(5);
//        page.setPath("/discuss/detail/" + discussPostId);
//        page.setRows(discussPost.getCommentCount());
//
//        //评论列表
//        //帖子评论
//        //回复：给评论的评论
//        List<Comment> commentList = commentService.findCommentsByEntity(ENTITY_TYPE_POST ,discussPost.getId()
//                ,page.getOffset() ,page.getLimit());
//        //评论VO列表
//        List<Map<String,Object>> commentVoList = new ArrayList<>();
//
//        if (commentList != null){
//            for (Comment comment:commentList) {
//                Map<String,Object> commentVo = new HashMap<>();
//                //这条评论必须存发帖人,评论内容，评论时间，评论数量
//                commentVo.put("user", userService.findUserById(comment.getUserId()));
//                commentVo.put("comment",comment);
//
//                //对该帖子评论的回复列表
//                List<Comment> replyList = commentService.findCommentsByEntity(ENTITY_TYPE_COMMENT,
//                        comment.getId(), 0, Integer.MAX_VALUE);
//                List<Map<String,Object>> replyVoList = new ArrayList<>();
//                if (replyList != null){
//                    for (Comment reply:replyList){
//                        Map<String,Object> replyVo = new HashMap<>();
//                        //回复
//                        replyVo.put("reply", reply);
//                        //作者
//                        replyVo.put("user", userService.findUserById(reply.getUserId()));
//                        //回复目标
//                        User target = reply.getTargetId() == 0 ? null : userService.findUserById(reply.getTargetId());
//                        replyVo.put("target", target);
//                        replyVoList.add(replyVo);
//                    }
//                }
//                commentVo.put("replys",replyVoList);
//                //回复数量
//                int replyCount = commentService.findCommentCount(ENTITY_TYPE_COMMENT,comment.getId());
//                commentVo.put("replyCount", replyCount);
//
//                commentVoList.add(commentVo);
//            }
//        }
//
//        model.addAttribute("comments",commentVoList);
//
//        return "/site/discuss-detail";
//    }


    @RequestMapping(path = "/detail/{discussPostId}", method = RequestMethod.GET)
    public String getDiscussPost(@PathVariable("discussPostId") int discussPostId, Model model, Page page) {
        // 帖子
        DiscussPost post = discussPostService.findDiscussPostById(discussPostId);
        model.addAttribute("post", post);
        // 作者
        User user = userService.findUserById(post.getUserId());
        model.addAttribute("user", user);

        //点赞数量
        long likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_POST, discussPostId);
        model.addAttribute("likeCount",likeCount);
        //点赞状态
        long likeStatus = hostHolder.getUser() == null ? 0:
                likeService.findEntityLikeStatus(hostHolder.getUser().getId(),ENTITY_TYPE_POST,discussPostId);
        model.addAttribute("likeStatus",likeStatus);

        // 评论分页信息
        page.setLimit(5);
        page.setPath("/discuss/detail/" + discussPostId);
        page.setRows(post.getCommentCount());

        // 评论: 给帖子的评论
        // 回复: 给评论的评论
        // 评论列表
        List<Comment> commentList = commentService.findCommentsByEntity(
                ENTITY_TYPE_POST, post.getId(), page.getOffset(), page.getLimit());
        // 评论VO列表
        List<Map<String, Object>> commentVoList = new ArrayList<>();
        if (commentList != null) {
            for (Comment comment : commentList) {
                // 评论VO
                Map<String, Object> commentVo = new HashMap<>();
                // 评论
                commentVo.put("comment", comment);
                // 作者
                commentVo.put("user", userService.findUserById(comment.getUserId()));

                //点赞数量
                likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT, comment.getId());
                commentVo.put("likeCount",likeCount);
                //点赞状态
                likeStatus = hostHolder.getUser() == null ? 0:
                        likeService.findEntityLikeStatus(hostHolder.getUser().getId(),ENTITY_TYPE_COMMENT,comment.getId());
                commentVo.put("likeStatus",likeStatus);


                // 回复列表
                List<Comment> replyList = commentService.findCommentsByEntity(
                        ENTITY_TYPE_COMMENT, comment.getId(), 0, Integer.MAX_VALUE);
                // 回复VO列表
                List<Map<String, Object>> replyVoList = new ArrayList<>();
                if (replyList != null) {
                    for (Comment reply : replyList) {
                        Map<String, Object> replyVo = new HashMap<>();
                        // 回复
                        replyVo.put("reply", reply);
                        // 作者
                        replyVo.put("user", userService.findUserById(reply.getUserId()));

                        //点赞数量
                        likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT, reply.getId());
                        replyVo.put("likeCount",likeCount);
                        //点赞状态
                        likeStatus = hostHolder.getUser() == null ? 0:
                                likeService.findEntityLikeStatus(hostHolder.getUser().getId(),ENTITY_TYPE_COMMENT,comment.getId());
                        replyVo.put("likeStatus",likeStatus);


                        // 回复目标
                        User target = reply.getTargetId() == 0 ? null : userService.findUserById(reply.getTargetId());
                        replyVo.put("target", target);

                        replyVoList.add(replyVo);
                    }
                }
                commentVo.put("replys", replyVoList);

                // 回复数量
                int replyCount = commentService.findCommentCount(ENTITY_TYPE_COMMENT, comment.getId());
                commentVo.put("replyCount", replyCount);

                commentVoList.add(commentVo);
            }
        }

        model.addAttribute("comments", commentVoList);

        return "/site/discuss-detail";
    }


    //置顶
    @RequestMapping(path = "/top",method = RequestMethod.POST)
    @ResponseBody
    public String setTop(int id){
        //先查一下当前post的type
        DiscussPost post = discussPostService.findDiscussPostById(id);
        if (post==null){
            return CommunityUtil.getJSONString(500,"当前帖子不存在！");
        }
        //获取置顶状态，1为置顶，0为普通，1^1=0,0^1=1
        int type = post.getType() ^ 1;
        discussPostService.updateDiscussPostType(id,type);

        //返回结果
        Map<String, Object> map = new HashMap<>();
        map.put("type",type);

        //触发发帖事件，同步数据到ElasticSearch
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setEntityId(id)
                .setEntityType(ENTITY_TYPE_POST)
                .setUserId(hostHolder.getUser().getId());
        eventProducer.fireEvent(event);
        return CommunityUtil.getJSONString(0,null,map);
    }


    //加精
    @RequestMapping(path = "/wonderful",method = RequestMethod.POST)
    @ResponseBody
    public String setWonderful(int id){
        DiscussPost post = discussPostService.findDiscussPostById(id);
        if (post == null){
            return CommunityUtil.getJSONString(500,"当前帖子不存在！");
        }
        //获取加精状态
        int status = post.getStatus() ^ 1;
        discussPostService.updateDiscussPostStatus(id,status);

        //返回结果
        Map<String, Object> map = new HashMap<>();
        map.put("status",status);

        //触发发帖事件，同步数据到ElasticSearch
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setEntityId(id)
                .setEntityType(ENTITY_TYPE_POST)
                .setUserId(hostHolder.getUser().getId());
        eventProducer.fireEvent(event);


        //计算帖子分数
        String redisKey = RedisUtil.getPostScoreKey();
        redisTemplate.opsForSet().add(redisKey,id);

        return CommunityUtil.getJSONString(0,null,map);
    }

    //删除
    @RequestMapping(path = "/delete",method = RequestMethod.POST)
    @ResponseBody
    public String setDelete(int id){
        discussPostService.updateDiscussPostStatus(id,2);

        //触发发帖事件，同步数据到ElasticSearch
        Event event = new Event()
                .setTopic(TOPIC_DELETE)
                .setEntityId(id)
                .setEntityType(ENTITY_TYPE_POST)
                .setUserId(hostHolder.getUser().getId());
        eventProducer.fireEvent(event);
        return CommunityUtil.getJSONString(0);
    }



}
